with a 3 inch header, and 2.5 exhaust, would a 2.5 dp yield more power?

 

i was told to get the 3 inch downpipe with the header and leave the 2.5 back. get in on the group buy for the cti header/downpipe combo!!!

 

I heard u should be even all around..dependin on your hp though

 

i bought the jbp vortex header in their group buy 477cdn shipped, i need to choose a header now

well roko, has a 2.6 pulley, 60 lbs injectors, 70/30 meth, 3 inch header and 2.5 dp, apparently its better for that kind of power?

 

i would say having some backpressure there would increase tq no so much hp. im not to sure tho

 

backpressure is bad. Velocity is good.

3" dp to 2.5" dp = good velocity. Good!

 

so 3 hd, 2.5 dp, 2.5exhaust

if so, which dp do you recommend at that size?